They're one of the dwarf angler species (3" or so TL) and typically hail from Hawaii, they tend to be on the cryptic side, and they're best kept in a species-only setup.
Like other anglers, they should be fed sparingly (2x-3x a week), and should be fed smaller fare as large items often rot in the fish's GI tract before they can be digested, which will indeed kill the angler.